machine Drawing T-Sheet

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SSM College of Engineering and Technology

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SEMESTER (ALL BRANCHES)

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T.SHEET 1 Q.1. Draw the Orthographic views of the following figures and show appropriate sectioning.

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T. SHEET NO:- 2

RIVETS AND RIVETED JOINTS

Fasteners: The devices used for holding together two parts of a machine or structure are called fasteners or fastenings. Classification: Fasteners are of two types: a. Temporary fasteners b. Permanent fasteners Temporary fasteners allow easy unfastening of the parts connected, without injuring the fastening element. e.g. nuts and bolts, screws, studs etc. Permanent fasteners cannot open without e.g.Riveting, soldering, welding, brazing etc.

RIVETS

breaking

the

element.

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Q.1. Draw the various types of rivet heads, giving suitable dimensions.

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RIVETED JOINTS Riveted joints are of two types: a.

Lap joint

b.

Butt joint

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FIG:- SINGLE RIVETED LAP JOINT

Important formulae: Lap Joint: Margin distance = 1.5D Row pitch = 2D in case of zigzag riveting and 2D+6 in case of chain riveting. Column pitch = 3D

Butt joint: Margin = 1.5D Row pitch = 2D in case of zigzag riveting and 2D+6 in case of chain riveting. Column pitch = 3D Main plate thickness = t Cover plate = 0.625t in case of double strap and 1.125t in case of single strap. Bottom plate = 0.625t

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WELDING Symbolic representation of welds:

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SCREWED FASTENING Q.1 Draw/sketch and label the elements of a screw thread indicating the main features. Q.2 Draw the various thread profiles. Q.3. Draw the three views of a hexagonal nut A. by standard method B. by rough rule. Q.4 Draw the three views of a square nut. Q.5 Draw the two views of a. flanged nut b. capstan nut c. castle nut d. wing nut e. knurled nut f. dome nut g. slotted nut

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Q.6. Sketch the various foundation bolts. Q.7. Draw the three views of the following assembly: a. hexagonal headed bolt, washer, hexagonal nut. b. hexagonal headed bolt, washer, square nut. c.square headed bolt, washer, hexagonal nut. d.hexagonal headed bolt, washer, hexagonal nut and lock nut. Q.8. Draw a studded joint for joining a plate of thickness 30mm using a stud of 25mm diameter. Also use a lock nut. Q.9. Draw in two views a. eye bolt b. countersunk headed bolt.

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SQUARE HEADED BOLT AND NUT (INCLINED)

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SQUARE HEDED BOLT AND NUT (UNINCLINED)

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HEXAGONAL HEADED BOLT AND NUT

FLANGED NUT

SPHERIRICALLY SEATED NUT

DOMED CAP NUT

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SLOTTED NUT

KNURLED NUT

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LOCK NUT

DIMENSIONS S.N O

DESCRIPTION

DIMENSIONS

WASHER 1.

2.

3.

4.

Diameter of washer 2D+3 Thickness 0.12D Angle of Chamfer 300 HEXAGONAL NUT STANDARD DIMENSIONS Height of the nut D Width across flat surface 1.5D+3 mm Angle of chamfer 300 Radius of chamfer 1.4D HEXAGONAL NUT ROUGH RULE DIMENSIONS Height of the nut D Distance across diagonally 2D opposite corners 300 Angle of chamfer 1.5D Radius of chamfer SQUARE NUT DIMENSIONS Height of the nut D Width across flat surface 1.5D+3

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Angle of chamfer Radius of chamfer

300 2D

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FOUNDATION BOLTS

T. SHEET: 4 JOINTS

Cotter and pin joints

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A. SOCKET AND SPIGOT COTTER JOINT

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